add detection and proper error message for musl based systems

2 files changed, 23 insertions, 4 deletions

diff --git a/lib/Controller/StaticController.php b/lib/Controller/StaticController.php
index 40f9b78..6fcf792 100644
--- a/lib/Controller/StaticController.php
+++ b/lib/Controller/StaticController.php
@@ -86,9 +86,7 @@ class StaticController extends Controller {
 		// we use this as an opportunity to do some checks and present error messages
 		// by serving a custom js file instead
 		if ($path === 'apps/api/documents/api.js') {
-			if (!file_exists($localPath)) {
-				$localPath = __DIR__ . '/../../js/notbuild.js';
-			} else if (!$this->setupCheck->check()) {
+			if (!$this->setupCheck->check()) {
 				$hint = $this->setupCheck->getHint();
 				$localPath = __DIR__ . '/../../js/binaryerror.js';
 				$rawContent = file_get_contents($localPath);
diff --git a/lib/SetupCheck.php b/lib/SetupCheck.php
index 5eb6983..1e36b85 100644
--- a/lib/SetupCheck.php
+++ b/lib/SetupCheck.php
@@ -21,7 +21,6 @@
 
 namespace OCA\DocumentServer;
 
-
 use OCA\DocumentServer\Document\ConverterBinary;
 
 class SetupCheck {
@@ -49,7 +48,29 @@ class SetupCheck {
 		if (!is_executable(ConverterBinary::BINARY_DIRECTORY . '/x2t')) {
 			return "can't execute x2t binary, ensure php can execute binaries in the app folder";
 		}
+		$ldError = $this->lddError();
+		if (strpos($ldError, 'ld-linux') !== false) {
+			return "using a musl libc based distribution is not supported";
+		} else if ($ldError) {
+			return "one or more dependencies are missing";
+		}
 
 		return '';
 	}
+
+	private function lddError(): string {
+		$descriptorSpec = [
+			0 => ["pipe", "r"],// stdin
+			1 => ["pipe", "w"],// stdout
+			2 => ["pipe", "w"] // stderr
+		];
+
+		$pipes = [];
+		proc_open('ldd x2t', $descriptorSpec, $pipes, ConverterBinary::BINARY_DIRECTORY, []);
+
+		fclose($pipes[0]);
+		$error = stream_get_contents($pipes[2]);
+
+		return trim($error);
+	}
 }